Ab Initio Nuclear Structure Calculations for Light Nuclei

2012 ◽  
Author(s):  
Robert Chase Cockrell
Keyword(s):  
Ab Initio ◽  
Nuclear Structure ◽  
Light Nuclei ◽  
Nuclear Structure Calculations ◽  
Structure Calculations

scholarly journals Accelerating many-nucleon basis generation for high performance computing enabled ab initio nuclear structure studies

2019 ◽  
Vol 33 (3) ◽  
pp. 522-533 ◽  
Author(s):  
Daniel Langr ◽  
Tomáš Dytrych ◽  
Kristina D Launey ◽  
Jerry P Draayer
Keyword(s):  
Ab Initio ◽  
Nuclear Structure ◽  
High Performance ◽  
Model Framework ◽  
Significant Acceleration ◽  
Model Spaces ◽  
Basis Construction ◽  
Nuclear Structure Calculations ◽  
Performance Computing ◽  
Structure Calculations

We present the problem of generating a many-nucleon basis in [Formula: see text]-scheme for ab initio nuclear structure calculations in a symmetry-adapted no-core shell model framework. We first discuss and analyze the basis construction algorithm whose baseline implementation quickly becomes a significant bottleneck for large model spaces and heavier nuclei. The outcomes of this analysis are utilized to propose a new scalable version of the algorithm. Its performance is consequently studied empirically using the Blue Waters supercomputer. The measurements show significant acceleration achieved with over two orders of magnitude speedups realized for larger model spaces.

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